Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-02-12
Phys.Rev.D78:083525,2008
Astronomy and Astrophysics
Astrophysics
7 pages, 7 figures, submitted to PRD
Scientific paper
10.1103/PhysRevD.78.083525
Inflation predicts a stochastic background of gravitational waves over a broad range of frequencies, from those accessible with cosmic microwave background (CMB) measurements, to those accessible directly with gravitational-wave detectors, like NASA's Big-Bang Observer (BBO), currently under study. In a previous paper [Phys. Rev. D73, 023504 (2006)] we connected CMB constraints to the amplitude and tensor spectral index of the inflationary gravitational-wave background (IGWB) at BBO frequencies for four classes of models of inflation by directly solving the inflationary equations of motion. Here we extend that analysis by including results obtained in the WMAP third-year data release as well as by considering two additional classes of inflationary models. As often noted in the literature, the recent indication that the primordial density power-spectrum has a red spectral index implies (with some caveats) that the amplitude of the IGWB may be large enough to be observable in the CMB polarization. Here we also explore the implications for the direct detection of the IGWB.
Cooray Asantha
Kamionkowski Marc
Smith Tristan L.
No associations
LandOfFree
The inflationary gravitational-wave background and measurements of the scalar spectral index does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The inflationary gravitational-wave background and measurements of the scalar spectral index, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The inflationary gravitational-wave background and measurements of the scalar spectral index will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-107620